512mb 7900GT vmod development thread

[aLVaMaN]

Any new here?

It is getting concrete now.
I will try it tomorrow

Regards, aLVaMaN

[KGB44]

Mod is working

On 600 OHM's, i reached 621MHZ + 40MHZ Geo Clock...

[KGB44]

Without any modifications you will mesure ~ 626 OHM's or a little bit more. You must reduce the Resistor until you mesure ~ 600 OHM's or something. You need only a fine and sharp pencil and 10 minutes time =)

Get my card from:

584 MHZ GPU Clock + 40 MHZ Geo Clock

to

621 MHZ GPU Clock + 40 MHZ Geo Clock


My Card is not one degree hotter than before - i think this is only ~ 0,025V more or something, can't mesure the voltage becouse my card is in my PC

Thanks to shamino from vr-zone.com and Alvaman - they gave the tip about that and i tested =D

[bbjayo]

I can confirm that this mod works on the 256mb Xpertvision 7900GS

I shaded the resistor down to 595ohms and I now get 1.42v in 3D.

That gets my clock up to 695

Am still having probs with my mem tho - can get it to 725 now. Must be something else holding that back. Anyone got any ideas?

bb

[KGB44]

But now ... we need a VMEM Mod, becouse the Palit Cards are using Infineon RAM with a standard voltage of 1,8V (!) not like the other cards with Hynix RAM @ 2,0V.

[bbjayo]

will the graphite stick or will it need to be redone after a while?

[KGB44]

I think it will stick =) ... if you don't have a Y.S.Tech Delta HE Fan with 8000 UPM which blows the graphit away

[aLVaMaN]

Palit / Xpertvision Geforce 7900GT 512MB VMod


A 10k Ohm variable resistor is recommended. Solder it to the point marked and to ground, for example a leg of the PCIe power (where the black cable goes to!)
To reach a higher VGPU, decrease the resistance to 600 Ohm or lower. 550 Ohm result in 1,45VGPU (my card!)


Regards,
aLVaMaN

We are working on the VMem Mod. I will edit this post.

Previous measurement data:
Voltage VGPU, Resistors VGPU